Which one was that? I played 1-50 on my Sorc a very long time ago and the only world [Flirt] I can remember that led to sexy times was that one on Nar Shadda that's part of the bonus series.
I forget his name, a sith on alderaan. I flirted. New scene, flirted again, got a sleep with option, got a great dialogue with Andy out of it. I then see him later as a Force Ghost (or some such) on Voss, in the storyline.